@misc{indiciae81fde1c20358,
  title = {Geology of the Frenchtown quadrangle, New Jersey-Pennsylvania},
  author = {Avery Ala Drake and Dean B. McLaughlin and Robert Ellis Davis},
  year = {1961},
  doi = {10.3133/gq133},
  url = {https://pubs.usgs.gov/publication/gq133},
  note = {Source identifier: gq133}
}